Tension Control Bolt Structural Button Head Grade A490 Steel Finish Plain Thread Size 1-8 Overall Length 4 In Thread Length 1 3/4 In Thread Type UNC Thread Direction Right Hand Head Dia 2 5/32 In Head Height 39/64 In Tensile Strength 150 000 to 173 000 PSI Rockwell Hardness HRC 39 Max Meets/Exceeds ASTM F2280 Type 1 Includes Grade DH Heavy Hex Nut and F436 Washer Package Quantity 100